Auxiliary gun stock

ABSTRACT

A conventional pump shotgun having a receiver from which the stock has been removed is provided with a pistol grip assembly on the end of the receiver and an elongated arm pivotally mounted on the pistol grip to be pivotable to an extended position. A butt plate is pivotally mounted on the other end of the arm and is pivotable to a position to define a shoulder plate.

United States Patent Hillberg Mar. 26, 1974 AUXILIARY GUN STOCK3,618,249 11/1971 Grandy .1 42/72 1,110,209 91914 K h 42 71 R [75]inventor: Robert Lee Hillberg, Cheshire, 2 476 355 711949 :21 R

Conn- P E A 1 1 [73] Assignee: Remington Arms Company, Inc., FOREIGN ATNTS OR PPL CAT ONS Bridgeport, Conn 1,065,756 9/1959 Germany 42/72 [22]Filed: 1972 Primary ExaminerBenjamin A. Borchelt 2 APPL 233 225Assistant Examiner-C. T. Jordan Attorney. Agem, 0r Firm-D. Verner Smythe[52] US. Cl. 42/72, 42/71 R 51 F41c 23/00 1 1 ABSTRACT [58] held ofSearch 42/72, 73, 71 R A Conventional pump Shotgun having a receiverfrom which the stock has been removed is provided with a [56] ReferencesC'ted pistol grip assembly on the end of the receiver and an UNITEDSTATES PATENTS elongated arm pivotally mounted on the pistol grip to2400349 5/1946 Haberstump 42/72 be pivotable to an extended position. Abutt plate is 2.431548 3/1948 Patchett 42/72 pivotally mounted on theother end of the arm and is 31405758 8/1946 Sampson 1 A 43/72 pivotableto a position to define a shoulder plate.

711,989 10/1902 Marble 42/71 R 1.096.861 5/1914 Redfield 42/72 8 Claims,7 Drawing Figures AUXILIARY GUN STOCK The present invention relates to apump shotgun provided with an auxiliary stock which is pivotable betweenfolded and extended positions.

The desirability of providing law enforcement officers with a rifle orshotgun with a folding stock that can be extended and fired from theshoulder has been generally recognized. This is particularly true withrespect to shotguns since shotguns are used to fire gas shells duringriots or other civil disturbances. While the conventional shotgun isadequate for firing such gas shells, the length of such a shotgun, whichis provided with a conventional shoulder stock, makes the firearmawkward and clumsy to handle. This is especially true when lawenforcement officers are in a motor vehicle and desire to remove thefirearm quickly from the vehicle for use. It has, therefore, beenproposed to remove the conventional stock and replace this stock by apistol grip. In order to accommodate the firearm for use as a shoulderfirearm, some form of a collapsible, foldable, or telescoping auxiliarystock has generally been mounted on the firearm. However, such anauxiliary stock has been generally disadvantageous in that it is undulycomplicated or else requires additional manipulative steps before thefirearm can be fired from the shoulder. The present invention is animprovement on U.S. Pat. No. 3,618,249.

One of the objects of the invention is to provide an improved auxiliarystock for shotguns.

Another of the objects of the invention is to provide an auxiliary stockwhich is pivotally mounted to the end of a shotgun from which the stockhas been removed and which is pivotable between foldable and extendedpositions.

Still another of the objects of the invention is to provide a shotgunhaving an auxiliary stock which is quickly and easily pivotable to anextended shoulder position.

According to one aspect of the present invention, there is provided anauxiliary stock assembly adapted to be mounted on the receiver of aconventional pump shotgun from which the stock has been removed. Theauxiliary stock assembly may comprise a pistol grip mountable on thereceiver and an auxiliary stock including an elongated arm pivotallymounted on the end of the receiver or to a pistol grip mounted on thereceiver and pivotable in a vertical plane relative to the shotgun to aposition to define a stock. Vertical plane refers to the gun when in itsnormal vertical position when being fired under normal use. A butt plateis pivotally mounted on the outer end of the arm and is pivotable to aposition to define a shoulder plate when the arm is extended. The armmay have a channel cross section so as to fit over the top of thereceiver and barrel assembly when in the folded position. In one formthere may be spring detent locking means or spring biased lockingplunger to retain the arm in the folded or operative position.

These and other objects, advantages, and features of the invention willbecome apparent from the following description and drawings which aremerely exemplary.

In the drawings:

FIG. 1 is a side elevational view of a shotgun provided with a stockaccording to the present invention with the stock bein shown in itsfolded position;

FIG. 2 is a view similar to that of FIG. 1 but showing only the rearportion of the shotgun with the stock being pivoted to its extendedposition;

FIG. 3 is an enlarged overall perspective view of a clamp ring forretaining shells in openings formed in the arm;

FIG. 4 is a top plan view of a portion of the shotgun shown in FIG. Iviewed along the line 44:

FIG. 5 is a side elevational view of the rear portion of a shotgunprovided with a conventional shoulder stock and showing in dash linesthe manner in which this stock is removed;

FIG. 6 is a fragmentary side view of an alternate form of butt platearrangement having a spring; and

FIG. 7 is a top view of FIG. 6.

Proceeding next to the drawings wherein like reference symbols indicatethe same parts throughout the various views, a specific embodiment ofthe present invention will be described in detail.

As may be seen in FIG. 5, a conventional pump shotgun indicatedgenerally at 10 has a stock 11 which is secured to the rear end of areceiver 12 by means of a stock bolt 13. The shotgun is conventional instructure in that it comprises a barrel 14 on the rear end of which isattached a rear sight assembly 15.

According to the present invention, stock 11 is removed from thereceiver assembly as indicated at 11' in FIG. 5 and replaced by a pistolgrip means 16 as may be seen in FIG. 1. The pistol grip 16 enables thefirearm to be fired as a handgun, but using two arms, since therelationship of the pistol grip 16 to a trigger 17 is similar to that ofa conventional handgun.

The auxiliary stock according to the present invention is indicatedgenerally at 18 and comprises an elongated arm 19 which has asubstantially U-shaped or channel-shaped cross section. One end of thearm 19 is pivotally mounted by a pin 20 to the upper end of the pistolgrip assembly 16 as show in FIG. 1 so as to form an auxiliary stockassembly. The extreme end of the arm 19 is provided with a notch 21which is engaged by a spring-biased detent or locking pin 22 when thearm is in the folded position as shown in FIG. 1 to retain the arm inthis position. That portion of the arm 19 indicated at 23 has a U-shapedcross section which enables the arm 19 to fit closely over the top ofthe receiver assembly and barrel when in the folded position. The web ofthis U-shaped portion is provided with a plurality of copenings 24 intowhich may be inserted a number of shot shells 25 with the shells beingretained in position by resilient clamping rings 26 shown in greaterdetail in FIG. 3.

The other end of the arm 19 is provided with a butt plate 27 which ispivotally mounted on pin 28. The butt plate is provided with a slot 29to accommodate rear sight 15. If desired, but not preferably, the end 30of the butt plate can be curved upwardly.

In the form shown in FIG. 4, a spring biased detent or locking pin 32 ispositioned in a tubular socket 33 secured in the other end of theauxiliary stock assembly and is engageable with an opening 34 in theside wall of the butt plate to retain the butt plate in the position asshown in FIG. 1.

In order to use the shotgun incorporating the present invention, thefirearm, with the auxiliary stock in a folded position, is removed fromits supporting bracket in a vehicle, such as a police car, and thedetent 22 pressed to release the arm 19. The arm 19 is then pivoted toits extended position as shown in FIG. 2 and is retained in thisposition by means of detent pin 22 becoming lockingly engaged in anopening 35 formed adjacent to the end of the arm 19. Concurrently withthe pivoting of the arm to its extended shoulder position, the buttplate 27 will be manually pivoted downwardly as indicated by the arrow36 in FIG. 2 and will be locked in place by pin 32 in aperture 34A. Thefirearm is now ready for use.

The pivot 28 is located relative to the butt plate so that a highpercentage of the plate 27, e.g., 80 percent, is below the pivot point.Thus, when the gun is fired, the forces are such that the plate will nottend to fold. In the form shown in FIGS. 6 and 7, detent 32 and relatedparts are omitted and a torsion spring 31 is provided. The torsionspring 31 is mounted on shaft 28 and is arranged so that as theauxiliary stock is moved toward its extended position, the butt platewill be pivoted to its downward position such as seenin FIG. 2. Ledges35A limit the movement of the butt plate in both illustrated forms ofthe invention. The shoulder 36A for the stock bolt preferably is locatedforward of the pin 22 so as to avoid any deformation of the hole inwhich pin 22 is located because of tightening of the stock bolt.

The present invention thus constitutes a substantial improvement tostandard riot guns or pump shotguns since a convenient pistol grip isprovided and a folding auxiliary stock is provided which can be carriedby the pistol grip and which pivots back over the barrel and permitsfiring of the firearm with the stock folded. It should also be apparentthat the shotgun can be fired without extending the auxiliary stock byusing the pistol grip alone.

It will be understood that changes in various details of constructionand arrangement of parts may be made without departing from the spiritof the invention, ex-

cept as defined in the appended claims.

What is claimed is:

1. In a conventional shotgun normally having a barrel, receiver andstock, an auxiliary stock adapted to be mounted on the receiver of saidconventional shotgun from which the stock has been removed, comprising asingle elongated arm having one end pivotally mounted adjacent the rearend of said receiver and pivotable in a vertical plane and upwardlyrelative to said shotgun to a position to define a stock, said auxiliarystock in folded position being on top of said receiver, a butt platepivotally mounted on the other end of said arm and pivotable to aposition to define a shoulder plate when the arm is rotated from overthe top of the receiver to an extended position, and spring means forpivoting the butt plate to its shoulder position.

2. An auxiliary stock as claimed in Claim 1 wherein said arm has achannel cross section having sufficient space between the sides of thechannel section to fit over and straddle the top of the receiver andbarrel in the folded position.

3. An auxiliary stock as claimed in claim 1 wherein a plurality of holesare provided in the arm into which shells can be inserted.

4. An auxiliary stock as claimed in claim 3 and further comprising clamprings positioned over the shells when inserted in said holes to retainthe shells.

5. In combination, a pump shotgun having a receiver from which a stockhas been removed, a pistol grip assembly attached to the end of saidreceiver a single elongated arm pivotally mounted on said pistol gripassembly and pivotable in a vertical plane and upwardly relative to saidreceiver to a position to define a stock and having a folded position ontop of said receiver so that the pistol grip can be used, and a buttplate means pivotally mounted on the outer end of said arm and pivotableto a position to define a shoulder plate when the arm is rotated fromover the top of the receiver to an extended position.

6. An auxiliary stock as claimed in claim 5 wherein said pistol gripassembly has means for selectively locking said elongated arm in itsfolded and extended position, stock bolt means for holding said pistolgrip assembly on said receiver, said pistol grip assembly having a stockbolt receiving aperture through said pistol grip assembly with aninternal shoulder located forward of said means for locking saidelongated arm.

7. In a conventional shotgun normally having a barrel, receiver andstock, an auxiliary stock adapted to be mounted on the receiver of saidconventional shotgun from which the stock has been removed, comprisingan elongated arm having one end pivotally mounted adjacent the rear endof said receiver and pivotable in a vertical plane relative to saidshotgun to a position to define a stock, a butt plate pivotally mountedon the other end of said arm and pivotable to a position to define ashoulder plate when the arm is extended, and means on said auxiliarystock to lock said elongated arm selectively in a folded and extendedposition, stock bolt means to hold said auxiliary stock assembled tosaid receiver, said auxiliary stock having a stock bolt receivingaperture therethrough, said aperture having an internal shoulder forwardof said means to lock.

8. In a shotgun normally having a barrel, receiver and stock, anauxiliary stock adapted to be mounted on the receiver of saidconventional shotgun from which the normal stock has been removed,comprising an elongated arm having one end pivotally mounted adjacentthe rear end of said receiver and pivotable in a vertical plane relativeto said shotgun to a position to define a stock, and a butt platepivotally mounted on the other end of said arm and pivotable to aposition to define a shoulder plate when the arm is extended, said buttplate having an opening therein to receive a rear sight when the arm isin its folded position.

1. In a conventional shotgun normally having a barrel, receiver andstock, an auxiliary stock adapted to be mounted on the receiver of saidconventional shotgun from which the stock has been romoved, comprising asingle elongated arm having one end pivotally mounted adjacent the rearend of said receiver and pivotable in a vertical plane and upwardlyrelative to said shotgun to a position to define a stock, said auxiliarystock in folded position being on top of said receiver, a butt platepivotally mounted on the other end of said arm and pivotable to aposition to define a shoulder plate when the arm is rotated from overthe top of the receiver to an extended position, and spring means forpivoting the butt plate to its shoulder position.
 2. An auxiliary stockas claimed in Claim 1 wherein said arm has a channel cross sectionhaving sufficient space between the sides of the channel section to fitover and straddle the top of the receiver and barrel in the foldedposition.
 3. An auxiliary stock as claimed in claim 1 wherein aplurality of holes are provided in the arm into which shells can beinserted.
 4. An auxiliary stock as claimed in claim 3 and furthercomprising clamp rings positioned over the shells when inserted in saidholes to retain the shells.
 5. In combination, a pump shotgun having areceiver from which a stock has been removed, a pistol grip assemblyattached to the end of said receiver a single elongated arm pivotallymounted on said pistol grip assembly and pivotable in a vertical planeand upwardly relative to said receiver to a position to define a stockand having a folded position on top of said receiver so that the pistolgrip can be used, and a butt plate means pivotally mounted on the outerend of said arm and pivotable to a position to define a shoulder platewhen the arm is rotated from over the top of the receiver to an extendedposition.
 6. An auxiliary stock as claimed in claim 5 wherein saidpistol grip assembly has means for selectively locking said elongatedarm in its folded and extended position, stock bolt means for holdingsaid pistol grip assembly on said receiver, said pistol grip assemblyhaving a stock bolt receiving aperture through said pistol grip assemblywith an internal shoulder locateD forward of said means for locking saidelongated arm.
 7. In a conventional shotgun normally having a barrel,receiver and stock, an auxiliary stock adapted to be mounted on thereceiver of said conventional shotgun from which the stock has beenremoved, comprising an elongated arm having one end pivotally mountedadjacent the rear end of said receiver and pivotable in a vertical planerelative to said shotgun to a position to define a stock, a butt platepivotally mounted on the other end of said arm and pivotable to aposition to define a shoulder plate when the arm is extended, and meanson said auxiliary stock to lock said elongated arm selectively in afolded and extended position, stock bolt means to hold said auxiliarystock assembled to said receiver, said auxiliary stock having a stockbolt receiving aperture therethrough, said aperture having an internalshoulder forward of said means to lock.
 8. In a shotgun normally havinga barrel, receiver and stock, an auxiliary stock adapted to be mountedon the receiver of said conventional shotgun from which the normal stockhas been removed, comprising an elongated arm having one end pivotallymounted adjacent the rear end of said receiver and pivotable in avertical plane relative to said shotgun to a position to define a stock,and a butt plate pivotally mounted on the other end of said arm andpivotable to a position to define a shoulder plate when the arm isextended, said butt plate having an opening therein to receive a rearsight when the arm is in its folded position.